The smart graphene (Gr) sensor developed by this team is self-assembly arranged through Gr. No traditional polarization process is further required due to use of high conductivity of Gr. Further, because of the conductivity of the Gr sensor itself, no additional electrodes are required for collecting the mechanical-electric signals.The process of manufacturing the piezoelectric film can be simplifiedthe cost of process reduced. Moreover, the Gr sensor can be directly coated on materials with different curved shapes and, the sensitivity of the direct-coated sensor can be greatly enhanced.

Aiming at the graphene sensor to replace the traditional strain gauge is our goal. The global production of the 2019 strain gauge is ~28.6 billion US dollars,the market growth rate is ~3.9. However, the process of it is complicatedat least includes 7 steps: (1) metal bonding, (2) curing, (3) development, (4) etching, (5) packaging, (6) mountingattaching,(7) signal testing. The process of our  sensor only includes 3 steps: (1) blendingstirring, (2) coating,(3) signal testing to complete all steps. Our technology greatly reduces the process steps of the sensor.

The potential applications of graphene sensors: (1) torque wrench: graphene sensors are used to replace traditional strain gauges (2) punch mould life testing: the high sensitivity of sensor can improve the yield (3) shock absorbers: shock-absorbing stability testing can be implemented be coated sensors (4) robotic arms for flexible gripper sensing application. Preliminarily, graphene sensor will be compared with the NMB products from Japan a major international strain gauge manufacturer,  the graphene sensor has the advantages of easy manufacturing, lower cost as well as easy installation.

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